Axes
Each example shows axes in four orientations. In clockwise order: top, right, bottom, left. Most commonly an x scale would be drawn with the bottom orientation, and a y scale would be drawn with the left orientation. For a scatterplot matrix, you might want to alternate orientations for the edge cells.
An open domain means that only ticks or grid lines are drawn:
It is also possible to draw both ticks and grid lines. If the ticks are not drawn, then the labels are positioned closer to the grid lines.
A closed domain means that we can visualize the domain extent. This can be done in by drawing a path:
Or by filling the background. In this case we include major and minor grid lines which subdivide the ticks:
Note that the grid lines can also be drawn with an open domain, as above. And the background need not be filled—we could instead stroke the background to create a frame.
Sometimes we want to label sections rather than points on the axes:
- scale - the associated scale, either ordinal or quantitative
- tickCount - the number of ticks to generate
- tickFormat - the function to format labels. if null, hide labels?
- tickGrid - major, minor, none
- orient - top, right, bottom, left
- domain - open, closed